1 Scope
This standard specifies classification, technical requirements, test methods, test rules, packaging, mark, packaging, storage, transportation requirements and installation precautions of highway bridge expansion and contraction installation.
This standard is applicable to expansion and contraction installation with 20mm-2000mm expansion and contraction amount used in highway bridge project.
2 Normative References
The following provisions contained in the following standards are turned into the provisions of this national standard by being referred in this national standard. For date reference, the subsequent amendments to (excluding amending error in the text) or revisions of, any of these publications do not apply. And parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, its latest edition referred to applies.
GB/T 528 "Rubber, Vulcamized or Thermoplastic--Determination of Tensile Stress-strain Properties" (eqv ISO 37)
GB/T 699 "Quality Carbon Structural Steels"
GB/T 700 "Carbon Structural Steels"
GB/T 702 "Hot-rolled Round and Square Steels--Dimension, Shape, Weight and Tolerance"
GB/T 912 "Hot-rolled Sheets and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels"
GB/T 985 "Basic Forms and Sizes of Weld Grooves for Gas Welding, Manual Arc Welding and Gas-shielded Arc Welding"
GB/T 1184 "No Marking Tolerance Value of Shape and Position Tolerance" (eqv ISO 2768-2)
GB/T 1499 "Hot Rolled Ribbed Steel Bars for the Reinforcement of Concrete" (neq ISO 6953-2)
GB/T 1591 "High Strength Low Alloy Structural Steels"(neq ISO 4950)
GB/T 1685 "Rubber vulcanized; Determination of Stress Relaxation in Compression at Normal and Elevated Temperature"
GB/T 1690 "Rubber, Vulcanized-Determination of the Effect of Liquids"(neq ISO 1817)
GB/T 1804 "General Tolerances-Tolerances for Linear and Angular Dimensions without Indivislual Tolerance Indications"(eqv ISO 2768-1)
GB/T 3274 "Carbon Structural and Low Alloy Steel-Hot rolled Plates and Strips"
GB/T 3323 "Methods for Radiographic Inspection and Classification of Radiographs for Fusion Welded Butt Joints in Steel"
GB/T 4172 "Atmospheric Corrosion Resisting Steel for Welded Structure"
GB/T 6343 "Cellular Plastics and Rubbers-Determination of Apparent (Bulk) Densityhske" (neq ISO 845)
GB/T 7759 "Rubber, Vulcanized or Thermoplastic-Determination of Compression Set at Ambient Elevated or Low Temperatures"(eqv ISO 815)
GB/T 11345 "Method for Manual Ultrasonic Testing and Classification of Testing Results for Ferritic Steel Welds"
GB 13013 "Hot Rolled Plain Steel Bars for the Reinforcement of Concrete"
JB/T 5943 "Construction Machinery-General Technical Specifications for Weldment"
JT/T 4 "Laminated Rubber Bearing of Highway Bridge"
JTG D60 "General Specifications for Design of Highway Bridges and Culverts"
JTJ 071 "Quality inspection and Evaluation Standards for Highway Engineering"
JTJ 025 "Specifications for Design of Steel Structure and Timber Structure Highway Bridges and Culverts"
3. Terms and Definitions
For the purposes of this national standard, the following terms and definitions apply.
3.1 Expansion and Contraction Joint
Expansion and contraction joint is the clearance located in the bridge superstructure to meet the needs of expansion and contraction and deformation of material.
3.2 Composite Expansion and Contraction Installation
To make the vehicle go through the bridge deck stably and to meet the deformation of bridge superstructure, composite expansion and contraction installation is the generic terms for all kinds of installations composed of such elements as rubber and steel products, which are located at bridge expansion and contraction joint.
3.3 Expansion and Contraction Quantity
Expansion and contraction quality is the sum of expansion and contraction of expansion and contraction installation. And minus (-) stands for expansion, while plus (+) stands for contraction.
3.4 Expansion and Contraction Body
Expansion and contraction body is the part which can be expanded and contracted in the expansion and contraction installation.
3.5 Transverse Stagger
Transverse stagger is the horizontal stagger being vertical with the bridge midline or suberect with the bridge midline.
3.6 Vertical Stagger
Vertical stagger is the stagger being vertical with the bridge deck or suberect with the bridge deck.
3.7 Longitudinal Stagger
Longitudinal stagger is horizontal stagger of expansion and contraction installation along bridge midline or approaching bridge midline.
4 Product Classification and Code Name
4.1 Product Classification
According to the structure of expansion and contraction body, expansion and contraction installations are classified into four classifications.
4.1.1 Modulus Expansion and Contraction Installation
Expansion and contraction body is the expansion and contraction installation combined by centre sill steel and 80mn unit rubber seal strip. And it is applicable to the highway bridge project whose expansion and contraction quality is 160mm-2000mm.
4.1.2 Coxcomb Expansion and Contraction Installation
Expansion and contraction body is the expansion and contraction installation combined by coxcomb. Generally it is applicable to the highway bridge project whose expansion and contraction is not larger than 300mm.
4.1.3 Rubber Expansion and Contraction Installation
Rubber expansion and contraction installation is divided into two types: plate type rubber and combined type.
a) If expansion and contraction body is the plate type rubber expansion and contraction installation combined by the vulcanized rubber and steel plate or angle iron, it is applicable to the highway bridge project whose expansion and contraction quality is less than 60mm.
b) If expansion and contraction body is the combined type expansion and contraction installation combined by rubber plate and steel support plate, it is applicable to the highway bridge project whose expansion and contraction quality is not larger than 120mm.
Rubber expansion and contraction installation should not be used for the bridge engineering of expressway and arterial road.
